SYNTHESIS OF NEW PRIMARY AND SECONDARY AMINES CONTAINING A CYCLOACETAL FRAGMENT

As a result of single-reactor reduction amination of 1-(5-methyl-1,3-dioxane-5-yl)ethane-1-one with primary amines of the aliphatic, cycloaliphatic and fat-aromatic series, the corresponding N-substituted 1-(5-methyl-1,3-dioxane-5-yl)ethane-1-amines with yields of 58-69% were obtained for the first time. Sodium cyanoboro-hydride is an effective reagent for reductive amination of the studied ketone, while sodium triacetoxyborohydride showed low activity in this reaction. Hydrogenolysis of N-benzyl-1-(5-methyl-1,3-dioxane-5-yl)-ethane-1-amine in the presence of palladium yielded 1-(5-methyl-1,3-dioxane-5-yl)ethane-1-amine with a yield of 91%.